A lid feeding device

Abstract

The utility model relates to bottle cap conveying and cap feeding technical field, concretely is a kind of cap feeding device, the utility model is by first the bottle cap of the foremost end of the conveying on conveying channel is separated to cap separating part, and its location is made so that bottle cap self-position does not move or / while make its bottle cap cannot self-rotate, the bottle cap is removed to cap feeding part under the drive of first drive mechanism and is positioned after being positioned by cap feeding part, the bottle cap positioned by cap separating part and cap feeding part is moved to set position under the drive of second drive mechanism of cap feeding part, and then cooperate with clamping part, so that clamping part can clamp or adsorb this bottle cap, so as to realize that clamping part clamps or adsorbs this bottle cap up and down, or carries out translation clamping or adsorption, so as to guarantee that the cap of various modes can realize good stability, for improving the accuracy of capture, the stability of cap pressing / screwing effect, and the processing efficiency of packaging link all have performance promotion.

Description

Technical Field

[0001] This utility model relates to the field of bottle cap conveying and cap feeding technology, specifically a cap feeding device. Background Technology

[0002] In order to increase production efficiency, maintain hygiene, and increase the production qualification rate, existing cap feeding equipment is usually used to transport bottle caps before capping or screwing on containers such as bottles. The equipment then coordinates the target bottle cap with the clamping part to complete the capping or screwing process.

[0003] The existing cap feeding channel is to uniformly transport the bottle caps that have been sorted into a set posture and discharged from the cap sorting equipment, and then transport them directly or indirectly to a set position to cooperate with the clamping part. When indirect conveying is used, it is usually used in conjunction with a rotating worktable so that bottle caps that are close together on the conveying channel enter the worktable in sequence and are separated by the corresponding worktable openings at equal distances. As the worktable rotates, the bottle caps that enter the worktable cooperate with the corresponding clamping parts, so that the clamping parts can grab the bottle caps. This type of cap feeding device is suitable for capping or screwing equipment with rotating worktables. When direct conveying is used, it is usually to adapt to linear capping or screw capping equipment. In this case, the advantages of the above-mentioned workstation tray design will not exist. Existing linear capping or screw capping equipment mainly relies on a gripper with vision sensing to independently grasp the bottle caps conveyed on the conveyor line to achieve independent separation of bottle caps. However, this setting will increase the manufacturing cost of the equipment, and the visual detection of the bottle cap position takes a certain amount of time, which will also lead to a reduction in production efficiency.

[0004] Meanwhile, the existing gripping mechanisms for bottle caps generally fall into two categories: one is vertical movement, such as the Chinese invention patent with publication number CN115213672A entitled "Turret-type Servo Capping Assembly Machine"; the other is planar movement, such as the Chinese invention patents with application number 2024110008111 entitled "A Bottle Cap Gripping Method" and application number 2024111049301 entitled "An Arc-shaped Cap Gripping Method". Therefore, in order to adapt to the above three common gripping methods, the cap feeding device needs to be adapted accordingly. The current cap feeding device is prone to causing the target cap to shift in position when it is picked up separately and then engaged with the clamping part. This makes it difficult for the clamping part to effectively and accurately grasp the cap. Furthermore, after the clamping part grasps the cap, the cap must still be kept horizontal. Otherwise, the non-horizontal cap will be unable to be capped or screwed on due to its tilt, or it will cause problems with the sealing of the bottle after sealing, increasing the probability of defective products. Secondly, existing bottle caps are divided into caps with straws, such as pump caps and gun caps; and caps without straws, such as round caps and stepped round caps. When gripping bottle caps such as round caps, the existing cap feeding part will cause the cap to move due to inertia during the translational movement. This makes it difficult for the grippers to grip the cap accurately when gripping it up and down. When gripping pump caps or gun caps, in addition to ensuring that the position of the cap itself does not shift due to inertia, it is also necessary to ensure that the cap head does not shift, which would prevent timely gripping. Furthermore, the straw may shift, preventing the straw from being inserted into the corresponding bottle or other container, thus preventing the capping or screwing process and resulting in defective products. Utility Model Content

[0005] The purpose of this invention is to provide a cap feeding device. First, the first cap conveyed on the conveying channel is independently moved to the cap separating section and limited. Then, it is moved to the cap feeding section and limited thereafter. Under the limitation of the cap feeding section, it is moved to a set position to cooperate with the clamping section, allowing the clamping section to grip or absorb the cap. Simultaneously, when dealing with pump caps or gun caps with straws, it prevents cap offset, eliminating the need for visual sensors or other components to identify the cap's orientation and avoid problems with cap gripping. Through the above solution, the cap maintains a horizontal posture and prevents cap offset during the cap separating and feeding process. This effectively improves the product qualification rate during the cooperation with the clamping section and during capping or screwing. Furthermore, it can be combined with different cap gripping methods to achieve different capping / screwing trajectories, shortening processing time and accelerating production efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A cap feeding device for cooperating with a cap feeding channel and a clamping part includes a cap separating part, a cap feeding part, a first driving mechanism and a second driving mechanism. The cap feeding channel is connected to the cap separating part at its output end along the cap feeding direction. One end of the cap separating part is connected to the first driving mechanism and the other end is cooperating with the cap feeding part. The cap feeding part is connected to the second driving mechanism. The cap-separating section is used to independently separate one bottle cap at the front end of the cap feeding channel and move it to the cap feeding section under the drive of the first driving mechanism, where it is limited by the cap feeding section. The cap feeding section, under the drive of the second driving mechanism, moves the limited bottle cap to a set position to cooperate with the clamping section; or, the cap-separating section is used to independently separate and limit one bottle cap at the front end of the cap feeding channel, and after moving it to the cap feeding section under the drive of the first driving mechanism and being limited by the cap feeding section, the cap feeding section, under the drive of the second driving mechanism, moves the bottle cap limited by both the cap-separating section and the cap feeding section to a set position to cooperate with the clamping section.

[0007] In the above scheme, different cap feeding channels are used to transport bottle caps such as round caps, stepped round caps, spray pump caps, duckbill pump caps, and gun caps. For non-rotating bottle caps, such as duckbill pump caps and gun caps, it is necessary to ensure that the cap heads face the same direction during transport; otherwise, it will affect the stability and accuracy of the cap separation process, cap feeding process, and the subsequent gripping process of these bottle caps. After the cap feeding channels meet the bottle cap transport requirements, a set cap separation section is used to independently separate and limit all types of bottle caps, and the first drive motor... Driven by the mechanism, the cap is moved along a set trajectory of multiple paths to the cap feeding part, so that the cap feeding part limits the cap for the second time. At this time, the cap dispensing part can continue to limit the cap or disengage from the cap and reset. Then, driven by the first driving mechanism, the cap feeding part transports the limited cap to the set position along a set trajectory of multiple paths, and then cooperates with the clamping part, so that the clamping part can grasp or adsorb various types of caps, and then place the cap on the bottle or other container, or perform the capping / screwing process at the same time after placing the cap.

[0008] In order to optimize the conveying trajectory of the cap dispensing section and the cap feeding section, and to adapt to common drive mechanisms on the market, such as cylinders, slide rails and sliders, gear racks and pinions to achieve rotary linear motion, etc., which have reciprocating drive functions and linear motion, thereby reducing the manufacturing cost of the equipment, the conveying trajectories of the cap dispensing section and the cap feeding section are limited to straight lines. In order to ensure that the bottle caps are pushed without deviation, the direction of their specific trajectories is optimized as follows.

[0009] Preferably, the cap feeding part and the cap separating part cooperate with each other, and the two parts transport the independently separated bottle caps to a set position in a "Z" shaped trajectory with an included angle greater than or equal to 90° and less than 180°, so as to cooperate with the clamping part.

[0010] In the above solution, the bottle cap, which is independently divided and limited at the front end of the cap feeding channel, is conveyed horizontally at a 90° angle to detach it from the conveying channel. Then, it is conveyed a second time at a 90° angle perpendicular to the horizontal conveying direction by the cap feeding part, moving it to a set position where it cooperates with the clamping part. The advantage of this method is that when conveying bottle caps without straws, such as round or stepped round caps, a stable pushing force can be generated by the sidewalls of the cap edge, ensuring that the bottle cap is stably moved to the set position of the cap feeding part and thus limited there. Since these bottle caps are round or stepped round caps, the part that cooperates with the bottle mouth is a rotating structure. Therefore, whether or not it rotates during the movement does not affect its subsequent adsorption and gripping. However, for bottle caps with straws, such as pump caps and gun caps, it is not only necessary to ensure that they can be stably moved out of the cap feeding channel, but also to ensure that the cap head does not shift during subsequent movement, so as not to affect the gripping of the subsequent clamping part. By using a Z-shaped trajectory with an included angle of 90°, it is moved laterally out and then longitudinally to the set position with the original orientation of the cap head, so as to cooperate with the clamping part. This ensures that the cap head still maintains the same orientation as the cap head on the cap feeding channel, and avoids the cap head shifting during the subsequent two movements, which would affect the gripping accuracy of the clamping part.

[0011] Furthermore, in order to avoid the subsequent handling of the orientation of the caps on bottles with straws, it is necessary to ensure that the caps are oriented in the same direction when entering the cap feeding channel. Therefore, the existing cap feeding channel is optimized and improved in different ways when conveying different types of bottle caps, so as to meet the set conveying and cap sorting requirements.

[0012] Preferably, the cap feeding channel includes a conveying unit and a limiting and guiding unit. The conveying unit is used to convey bottle caps, and the limiting and guiding unit is connected to the conveying unit. The limiting and guiding unit is used to limit the conveying direction of the bottle caps, or to limit the bottle caps' rotation while limiting the conveying direction of the bottle caps.

[0013] Furthermore, the aforementioned conveying unit can be set horizontally or partially tilted upwards / downwards. It only needs to ensure that its output end is set horizontally to independently separate and limit the foremost bottle cap. Its downward tilting setting allows the bottle caps continuously discharged from the cap feeder to abut against each other, and through the pushing force of the discharge, the bottle caps can move autonomously on the horizontally or downwardly tilted conveying unit. Under the restriction of the limiting and guiding unit, they are conveyed according to the set trajectory. This can prevent the cap head of the bottle cap with the straw from rotating freely, causing inconsistent cap orientation and affecting subsequent operations.

[0014] Furthermore, in order to independently separate bottle caps with and without straws, the cap-separating section is functionally divided to first achieve independent separation and ensure that the caps do not shift before being conveyed to the cap-feeding section. Since the types and characteristics of bottle caps with and without straws are quite different, the specific structure of the separating unit is defined to achieve the same / corresponding technical effects and obtain the same or corresponding technical functions.

[0015] Preferably, the cap-separating section includes a separating unit and a limiting unit. The separating unit is connected to the output port at the front end of the cap-feeding channel and is used to restrict the movement of the cap at the front end of the cap-feeding channel. The limiting unit is connected to the first driving mechanism. The limiting unit performs secondary limiting on the cap whose movement is restricted by the separating unit, or simultaneously limits the rotational offset of the cap, and sends it to the cap-feeding section under the drive of the first driving mechanism.

[0016] Furthermore, since the bottle caps on the cap feeding channel can move actively or passively, in order to move the independently divided bottle caps to the cap feeding section, subsequent bottle caps cannot actively enter the dividing unit. Therefore, this problem can be solved by limiting the movement mode of the bottle caps on the cap feeding channel, or by additional structures.

[0017] Preferably, the limiting unit is further connected to a baffle, which is used to block bottle caps that are not limited by the separating unit and can continue to move.

[0018] Furthermore, in order to deliver different types of bottle caps and cooperate with the clamping unit to achieve vertical or horizontal cap gripping / adsorption, or horizontal cap gripping / adsorption, and to ensure that the caps of bottle caps with straws do not shift, and to limit the displacement of the bottle cap position due to inertial force during the movement of the bottle caps, the cap delivery unit is functionally divided. This allows for limiting the position of the bottle caps during both the conveying process of the cap dispensing unit and its own output process. Through the design of different limiting grooves, it cooperates with different cap gripping methods to ensure that the caps of bottle caps with straws do not shift.

[0019] Preferably, the cap feeding part includes a mounting plate and a limiting groove. The mounting plate is connected to the second driving mechanism, and the mounting plate has a limiting groove for restricting the free movement of the bottle cap and having a guiding function.

[0020] Furthermore, while defining the shape and size of the limiting groove can also prevent the cap of a bottle with a straw from shifting, the original design of the above solution achieves this by locking the straw in place. However, for some customers, this can cause the straw to wear down. Although this doesn't affect actual use, it does impact the straw's appearance. Therefore, to solve this problem, the following design is used. This design not only prevents the straw from wearing down but also achieves, for example, the straw insertion aid with a built-in straw cap as described in patent number CN202323628069.2. In the Chinese utility model patent for the assistive device, it is necessary to enable the clamping part to grip the bottle cap and straw together to assist in guiding the straw into the bottle or other container. The reason for achieving this effect is that the straws of existing bottle caps are not necessarily all straight. During transportation, they are squeezed and collided, which can cause the straw to bend. At the same time, the material of some straws makes them curved in the production process. If such straws are not straightened, the existing clamping part without vision sensors has difficulty gripping the straw, which affects the smooth entry of the straw into the bottle or other container and affects the sealing process such as capping or screwing on the cap.

[0021] Preferably, the mounting plate is further provided with a limiting part, which is used to limit the cap of the bottle cap with straw from shifting during the movement of the mounting plate, and at the same time straighten part of the straw.

[0022] Furthermore, in order to deliver caps quickly and efficiently, and to avoid the cap sorting efficiency of the cap sorting device affecting the separation of bottle caps at the front end of the cap delivery channel, which would in turn affect the efficiency of cap delivery and ultimately the efficiency of capping or screwing, a third drive mechanism is set up to realize the active movement of bottle caps on the conveying unit, so that bottle caps are always piled up at the front end of the cap sorting section, ensuring that subsequent work can operate smoothly.

[0023] Preferably, it also includes a third driving mechanism, which is connected to the conveying unit and is used to actively drive the bottle caps on the conveying unit to move along the conveying direction.

[0024] Furthermore, when the aforementioned third driving mechanism is driven by air blowing, in order to balance the airflow requirements on the bottle cap's moving speed, a limiting plate is set to prevent excessive airflow from blowing round bottle caps away from the conveying unit.

[0025] Preferably, it also includes a limiting plate, which is installed on the conveying unit and is located directly above the bottle cap thereon, in order to prevent the bottle cap from being passively detached from the conveying unit.

[0026] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. There are many existing cap feeding devices used in linear capping or screw-capping equipment. For example, Chinese invention patent application number CN202411394920.6, entitled "A Cross-Layout Screw-Cap Structure," includes a cap feeding device that uses up-and-down movement. This device requires first placing the bottle cap on the placement slot, then lifting it so that the clamping part can grab the bottle cap, then lowering the placement slot, and then moving the clamping part to complete the screw-capping process. The preferred solution adopted by the cap feeding device of this utility model is that the bottle cap at the front end of the cap feeding channel is first independently separated, then transported to the designated position, and then pushed by the second drive mechanism to install. The plate moves, causing the bottle cap, which is limited by the upper positioning groove of the mounting plate, to reach the set position. The clamping part grasps the cap by moving up and down, or by using the planar movement of the clamping part as used in the Chinese invention patent application number 2024110008111 entitled "A Bottle Cap Grabbing Method". The cap feeding device with this solution improves the stability of the bottle cap being separated from the cap feeding channel. At the same time, it ensures that the bottle cap is always limited during the cap feeding process, and will not shift its position due to inertia. It will also prevent the cap head of the bottle cap with the straw from shifting due to vibration or inertial force, which would prevent the clamping part from grasping the cap.

[0027] 2. In the technical solution adopted by this utility model, by setting the driving force direction of the first driving mechanism and the second driving mechanism, combined with the setting of the orientation of the limiting groove, the bottle cap is always blocked by the side wall of the limiting groove during the Z-shaped movement at a 90° angle, avoiding the change of position of the bottle cap due to inertia during multiple intermittent movements; at the same time, the orientation of the limiting groove is consistent with the bottle conveying direction, so that after the clamping part grabs the bottle cap, it can directly drive the bottle cap to slide out of the limiting groove, realizing bottle-tracking capping or positioning capping, avoiding the need, for example, waiting for the placement groove to descend before the clamping part can move to complete the capping process, or the clamping part rising autonomously after grabbing and then moving to complete the capping process, as required by Chinese invention patent application number CN202411394920.6, entitled "A Cross-Layout Capping Structure". This improves the speed of cap grabbing and movement, reduces unnecessary waiting time, and improves the production efficiency of the corresponding process.

[0028] 3. The technical solution adopted in this utility model differs from the existing technology's use of motor drive for conveying, separating, and transporting individual bottle caps. Firstly, the motor-driven conveyor belt increases manufacturing costs and leads to unnecessary waste. Secondly, compared to a cylinder, the motor's response time is slower, and the conveying distance is difficult to control. In existing processes, capping or pressing bottle caps with diameters from 20mm to 80mm typically completes the bottle tracking, sealing, and pre-cap repositioning process within 1 to 2.5 seconds. Therefore, to improve the efficiency of the capping or pressing process, it is necessary to increase the cap feeding speed and the accuracy of the bottle cap position. To meet higher requirements, the technical solution of this utility model allows the cap-splitting part to be reset in time during the process of the cap-feeding part moving the cap and the clamping part gripping the cap, so that the caps can be re-splitting. After the cap-feeding part is reset, the separated caps are quickly moved to the cap-feeding part. The second drive mechanism moves the caps that are simultaneously limited by the cap-splitting part and the cap-feeding part to the set position, waiting in advance for the clamping part to clamp the caps. The cylinder, as the drive device, can have its movement distance fixed. Moreover, the cylinder has a fast response speed, low energy consumption, and low manufacturing cost, which can realize the lightweight design concept of the local equipment. When the cylinder is working, the vibration is less than that when the motor is working, which reduces the impact of vibration on the caps of the separated caps with straws. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a stepped round cap in existing bottle cap technology; Figure 2 This is a schematic diagram of the structure of a gun cap in existing bottle cap technology; Figure 3 This is a schematic diagram of the pump cap structure in existing bottle cap technology; Figure 4 This is a schematic diagram of the structure of the stepped round cap embodiment of the present invention, showing that the cap is independently separated and limited. Figure 5 This is a schematic diagram of the structure for limiting the cap delivery part in an embodiment of the stepped round cap of this utility model; Figure 6 This is a schematic diagram of the structure of the bottle cap and the clamping part when they are engaged in the embodiment of the stepped round cap of this utility model; Figure 7 This is a schematic diagram of the structure of the bottle cap being independently separated and limited in the embodiment of the present utility model for the gun cap; Figure 8 This is a schematic diagram of the structure of the bottle cap being limited by the cap delivery part in the embodiment of the present invention for the gun cap; Figure 9 This is a schematic diagram of the structure of the bottle cap and the clamping part in the embodiment of the present utility model for the gun cap; Figure 10 for Figure 9 A sectional view of section AA; Figure 11 for Figure 9 Enlarged view of section B; Figure 12 for Figure 11 A cross-sectional view of the air outlet in the CC section.

[0030] In the diagram: 1. Cap delivery channel; 11. Conveying unit; 111. Conveying plate; 112. Support plate; 12. Limiting and guiding unit; 122. Guide rod; 2. Cap distribution section; 21. Separating unit; 211. L-shaped plate; 212. Partition; 22. Limiting unit; 221. N-shaped plate; 222. Baffle; 3. Cap delivery section; 31. Mounting plate; 32. Limiting groove; 33. Limiting part; 331. Elastic element; 4. First driving mechanism; 5. Second driving mechanism; 6. Bottle cap; 61. Stepped round cap; 62. Gun cap; 621. Cap head; 622. Straw; 63. Pump cap; 7. Third driving mechanism; 71. Air outlet; 8. Limiting plate. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] First embodiment: (for bottle cap 6 without straw 622)

[0033] As one embodiment of this utility model, refer to Figure 1 , Figures 4 to 6 In the existing conveying channel for conveying round caps and stepped round caps 61, the height difference of the conveying unit 11 and the thrust formed by the bottle caps 6 continuously discharged in the cap sorter are usually used to make the bottle caps 6 on the conveying unit 11 be pushed by the subsequently entering bottle caps 6 for passive conveying. The limiting guide unit 12 set on the conveying unit 11 can realize the guiding function of the bottle caps 6, so that the bottle caps 6 are conveyed according to the set trajectory and method. The existing conveying unit 11 for conveying bottle caps 6 without straws 622 is mainly composed of conveying plate 111. It generally does not use belt drive or other methods to deliver the caps, as such a setup would increase manufacturing costs. The limiting guide unit 12 can be a sliding groove opened on the conveyor plate 111, so that the bottle cap 6 is pushed by the subsequent bottle cap 6 entering in the groove and slides along the set trajectory of the groove until it slides to the corresponding output end. The limiting guide unit 12 can also be Figure 1 The guide rod 122 in the middle is symmetrically arranged to clamp the bottle cap 6. If the bottle cap 6 is a round cap, the side wall of the round cap can be clamped to achieve the limiting and guiding function of the round cap. When clamping the stepped round cap 61, the upper part of the bottle cap 6 can be clamped. At this time, not only can the limiting and guiding function be achieved, but it can also cooperate with the third drive mechanism 7 to achieve additional functions. In this embodiment, the cap-separating section 2, which independently separates the bottle caps 6 conveyed on the conveyor plate 111, includes a separating unit 21 and a limiting unit 22. The separating unit 21 can be an L-shaped plate 211, one end of which is connected to the conveyor plate 111. When the bottle cap 6 has a unique size, a fixed connection can be used. When the bottle cap 6 size is not unique for ease of disassembly or production requirements, a detachable connection can be used. Different sizes of L-shaped plates 211 are used to separate bottle caps 6 of different specifications. The L-shaped plate 211 is installed on... Figure 3 As shown, the effective width and length of its base plate are both greater than or equal to the maximum diameter of the bottle cap 6. Its vertical plate protrudes from the base plate to limit the continued movement of the bottle cap 6. Before the L-shaped plate 211 enters the bottle cap 6, its limiting unit 22 works to the set position to prevent the bottle cap 6 that has entered the L-shaped plate 211 from sliding out of the L-shaped plate 211 due to the lack of constraint and the pushing force of the subsequent bottle cap 6. Of course, this problem can also be avoided by controlling the movement of the subsequent bottle cap 6. In this embodiment, the limiting unit 22 adopts the structure of an n-shaped plate 221, so that the distance between the inner cavities of the n-shaped plate 221 is slightly larger than the maximum diameter distance of the bottle cap 6, so that the bottle cap 6 can enter the L-shaped plate 211 under the limiting of the n-shaped plate 221. One end of the n-shaped plate 221 is connected to the first driving mechanism 4, which is used to drive the n-shaped plate 221 to achieve translational movement, so that the n-shaped plate 221 can drive the bottle cap 6 into the cap feeding part 3; In this embodiment, the limiting unit 22 can also use a cylinder that opens and closes in opposite directions to clamp the corresponding bottle cap 6, and under the drive of the first driving mechanism 4, place the clamped bottle cap 6 on the cap feeding part 3 according to the set trajectory and limit it thereto; of course, in this embodiment, when the limiting unit 22 moves the bottle cap 6, it can also use a mechanical gripper structure to complete the corresponding operation.

[0034] In this embodiment, the cover delivery part 3 includes a mounting plate 31 and a limiting groove 32. The mounting plate 31 is connected to the second drive mechanism 5. The mounting plate 31 has a limiting groove 32. The limiting groove 32 can be a circular groove, an oblong groove, or a combination of a circular groove and a trapezoidal groove. When the limiting groove 32 is a circular groove, its diameter is slightly larger than the maximum diameter of the round cap or the stepped round cap 61. The upper surface of the mounting plate 31 should not be higher than the height of the bottom plate on the L-shaped plate 211 where the bottle cap 6 is placed, so that the n-shaped plate 221 can push the bottle cap 6 into the circular groove and limit it. At this time, the limiting groove 32 is a circular groove that is adapted to the clamping part to move up and down to grab the cap or to use a suction cup to move up and down to pick up the bottle cap 6. When the limiting groove 32 is a combination of an oblong groove or a circular groove and a trapezoidal groove, the diameter of the circular groove portion is slightly larger than the maximum diameter of the bottle cap 6. The oblong groove extends through one end of the mounting plate 31, with its extension facing the bottle cap 6 of the L-shaped plate 211. The direction of movement of the conveyed bottle on the conveyor line also needs to be towards the L-shaped plate 211, so that the bottle cap 6 in the limiting groove 32 can be gripped by the clamping part in this direction and then slide out of the limiting groove 32 to complete the capping or screwing process. The bottom surface of the limiting groove 32 is not higher than the L-shaped plate 211. The bottom surface of the bottle cap 6 is placed on the plate 211, preferably at the same height. When the limiting groove 32 is a combination of an oblong groove or a circular groove and a trapezoidal groove, its minimum diameter should be slightly larger than the maximum diameter of the bottle cap 6, so that the bottle cap 6 can better enter the set position along the edge of its limiting groove 32, so that the bottle cap 6 is limited after stopping at the set position. At this time, when the limiting groove 32 is a combination of an oblong groove or a circular groove and a trapezoidal groove, it is adapted to the clamping part to perform horizontal moving gripping of the cap or to use a suction cup to pick up the bottle cap 6 and then move it out horizontally.

[0035] The depth of the aforementioned limiting grooves 32 is less than the height of the bottle cap 6. Preferably, the depth is one-third to one-sixth of the height of the largest diameter portion of the bottle cap 6. The clamping parts of the two types of bottle cap 6 mentioned above are common structures in the prior art, and will not be described in detail here. The relevant structure can be referred to the Chinese utility model patent with application number CN202122927289.X entitled "A Round Cap Pump Cap Double Line Gripping Device"; the method of clamping the bottle cap 6 can be referred to the relevant method in the background art cited documents. The first driving mechanism 4 and the second driving mechanism 5 mentioned above can be multi-axis linkage driving mechanisms or single-axis reciprocating motion driving mechanisms. When the bottle cap 6, which is limited by the cap-separating part 2 or the cap-feeding part 3, moves along a straight trajectory, the first driving mechanism 4 and the second driving mechanism 5 can be driven by cylinders or can be replaced by a structure commonly available on the market that can form a straight motion trajectory. If it is necessary to make the bottle cap 6, which is limited by the cap-separating part 2 or the cap-feeding part 3, move along other trajectories, such as arc motion, the movement of the bottle cap 6 can be guided by the side wall shape of the limiting groove 32, or the first driving mechanism 4 and the second driving mechanism 5 can be in the form of multiple cylinders connected to each other to achieve linear composite motion of three coordinate systems to achieve arc trajectory motion. Furthermore, in order to accommodate more preferred methods of conveying bottle caps 6 and to prevent bottle caps 6 that have not entered the cap-separating section 2 from moving forward, the limiting unit 22 also includes a baffle 222. The baffle 222 is connected to the side of the n-shaped plate 221 near the first driving mechanism 4. The height and length of the baffle 222 can prevent subsequent bottle caps 6 on the cap-separating channel 1 from actively or passively entering the L-shaped plate 211 during the process of the n-shaped plate 221 sending the bottle caps 6 that it limits into the cap-separating section 3 and after sending them in.

[0036] Second embodiment: (for bottle cap 6 with straw 622)

[0037] As one embodiment of this utility model, refer to Figure 2 , Figure 3 , Figures 7 to 9 In the existing cap feeding channel 1, when conveying pump caps 63 and gun caps 62, the height difference of the conveying unit 11 and the thrust generated by the bottle caps 6 continuously discharged from the cap feeder (the structure is referenced in the relevant structure in the Chinese utility model patent with application number CN201721366440.4, entitled "Discharge Mechanism for Cap Feeder") are used to cause the bottle caps 6 on the conveying unit 11 to be passively conveyed by the bottle caps 6 that subsequently enter. The limiting guide unit 12 set on the conveying unit 11 can guide the bottle caps 6, so that the bottle caps 6 are conveyed according to the set trajectory and method. The existing conveying unit 11 for conveying bottle caps 6 with straws 622 mainly consists of two support plates 112 with a gap between them. The distance between the gaps is smaller than the diameter of the bottle cap 6 in contact with the support plates 112. Preferably, when it is not necessary to offset the cap 621, i.e., when the limiting guide unit 12 is not needed, the distance between the gaps is smaller than the sum of the radius of the straw 622 and the radius of the bottle cap 6 in contact with the support plates 112. This prevents the bottle cap 6 with straws 622 from being squeezed out of the clamping limit of the two support plates 112 during conveying. However, the distance between the gaps should also be greater than the diameter of the straw 622 to avoid interfering with the movement of the bottle cap 6 and causing wear to the straw 622. The function of guiding the conveying direction of the bottle cap 6 can be achieved by intermittently setting a trajectory between the two support plates 112. The existing conveying unit 11 generally does not use two belts for clamping and driving the cap delivery, as such a setting would increase manufacturing costs. The limiting guide unit 12 can be a vertical plate set on the two support plates 112 and perpendicular to them. By setting the distance between the two vertical plates, the cap 621 of the bottle cap 6 cannot rotate within the two vertical plates and reduces the angle of its offset, thus limiting the rotation of the cap 621 and preventing excessive offset. At the same time, under the limitation of the two vertical plates, the bottle cap 6 is pushed by the subsequent bottle cap 6 and slides along the set trajectory of the gap between the vertical plate and the two support plates 112 until it slides to the corresponding output end. Since the cap 621 of the bottle cap 6 is restricted at this time, the distance between the two support plates 112 only needs to be less than the distance between the bottle cap 6 parts supported by the support plates 112. However, the distance of the gap should also be greater than the diameter of the straw 622 of the bottle cap 6 to avoid interfering with the movement of the bottle cap 6 and causing wear to the straw 622. The limiting guide unit 12 can also be Figure 2 The guide rod 122, through symmetrical arrangement, clamps the cap 621 of the bottle cap 6. If the bottle cap 6 is a common spray pump cap 63, since the cap 621 of this type of pump cap 63 is a rotating body shape, by clamping the side wall of its cap 621, the bottle cap 6 can be limited and guided. Although the bottle cap 6 can still rotate, its rotation will not affect the gripping of the clamping part. When the guide rod 122 is used for spray pump cap 63, gun cap 62, or duckbill pump cap 63, it can preferably clamp the upper part of the cap 621 of the bottle cap 6. At this time, it can not only limit the rotation of the bottle cap 6 and guide it, but also achieve additional functions under the drive of the third drive mechanism 7. The two structures of the aforementioned limiting and guiding unit 12 can also be used in combination to limit the offset of the cap 621 of the bottle cap 6, which has large differences.

[0038] In this embodiment, the cap-separating part 2, which independently separates the bottle caps 6 at the foremost end conveyed on the conveyor plate 111, includes a separating unit 21 and a limiting unit 22. The separating unit 21 can be two partitions 212, which are respectively connected to two support plates 112. A gap is also left between the two partitions 212 to allow the straw 622 to pass through. The two partitions 212 can be set perpendicular to the support plate 112 or connected to the support plate 112 at a set angle.

[0039] One end of each of the two partitions 212 is connected to one of the two support plates 112. When the bottle cap 6 has a unique size, a fixed connection can be used. When the bottle cap 6 has multiple sizes for easy disassembly, a detachable connection can be used. Different gaps are set to accommodate the separation and guiding transport requirements of bottle caps 6 of different sizes. The installation of the two partitions 212... Figure 6As shown, the two partitions 212 are preferably arranged perpendicular to the support plate 112 to limit the continued movement of the bottle cap 6. Before the bottle cap 6 enters between the two partitions 212, the limiting unit 22 works to a set position to prevent the bottle cap 6, which has entered between the two partitions 212, from sliding out along the gap between the two partitions 212 due to the lack of constraint and the pushing force of the subsequent bottle cap 6, causing its cap 621 to shift. Of course, this problem can also be avoided by controlling the movement of the subsequent bottle cap 6. In this embodiment, the limiting unit 22 adopts the structure of an n-shaped plate 221, such that the distance between the inner cavities of the n-shaped plate 221 is slightly larger than the maximum diameter distance of the bottle cap 6, and the internal structure of the n-shaped plate 221 is similar to the shape of the cap head 621 of the bottle cap 6 (not shown in the figure), and does not affect the bottle cap 6 from passing through the front and rear openings of the n-shaped plate 221. This allows the bottle cap 6 to enter between the two partitions 212 under the limiting of the n-shaped plate 221. One end of the n-shaped plate 221 is connected to the first driving mechanism 4, which is used to drive the n-shaped plate 221 to achieve translational movement, so that the n-shaped plate 221 can drive the bottle cap 6 into the cap feeding part 3; In this embodiment, the limiting unit 22 can also use a cylinder that opens and closes in opposite directions to clamp the corresponding bottle cap 6, and under the drive of the first driving mechanism 4, the bottle cap 6 to be clamped is placed in the cap feeding part 3 and limited by it according to the set trajectory. In this embodiment, the cover delivery part 3 includes a mounting plate 31 and a limiting groove 32. The mounting plate 31 is connected to the second driving mechanism 5, and the upper surface of the mounting plate 31 is at the same height as or not higher than the upper surface of the partition 212. The mounting plate 31 has a limiting groove 32, which can be an oblong groove, a combination of a circular groove and a trapezoidal groove. The portion of the limiting groove 32 perpendicular to the mounting plate 31 passes through the mounting plate 31, and the portion parallel to the mounting plate 31 passes through one end of the mounting plate 31, for mutual cooperation with the gap between the two partitions 212. When the limiting groove 32 is an oblong groove, the diameter of the rectangular part of the oblong groove is slightly larger than the diameter of the straw 622, so that the straw 622 can easily enter and exit. The diameter of one end of the arc is equal to or slightly smaller than the diameter of the straw 622 of the bottle cap 6. The upper surface of the mounting plate 31 is preferably at the same height as the upper surface of the partition 212, so that the n-shaped plate 221 can push the bottle cap 6 into the arc part along the gap between the two partitions 212 and the rectangular part of the oblong groove, so that the straw 622 is locked and limited by the arc part, thereby restricting the cap 621 of the bottle cap 6 from rotating and shifting. When the limiting groove 32 is as follows Figure 6When the circular groove and trapezoidal groove are combined, the diameter of the circular groove is slightly smaller than the diameter of the bottle cap 6 and the straw 622. The maximum diameter of the trapezoidal groove is matched with the maximum diameter of the bottle cap 6 to prevent the bottle cap 6 from falling off when sliding on it. Its minimum diameter should be slightly larger than the diameter of the straw 622 so that the bottle cap 6 can be better positioned under the support of the mounting plate 31 and the guidance of the straw 622 under the limiting groove 32. After the bottle cap 6 stops at the setting position, it engages with the circular groove, thus limiting the bottle cap 6. The direction of movement of the bottle on the conveyor line needs to be consistent with the direction of the limiting groove 32 through the mounting plate 31, so that the bottle cap 6 in the limiting groove 32 can be gripped by the clamping part in this direction and slide out of the limiting groove 32 to complete the capping or screwing process.

[0040] When the clamping part grips the bottle cap 6 that is limited inside by the above two types of limiting grooves 32, if the straw 622 of the bottle cap 6 is straight or not too curved, the limiting groove 32 is adapted to the clamping part to only grip the cap 621 of the spray bottle cap 6, and then move it up and down or horizontally to remove it to complete the capping or screwing process. When gripping the duckbill pump cap 63 and gun cap 62, suction cups are generally not used to remove the caps. When the straw 622 of the bottle cap 6 is bent, in order to ensure that the straw 622 of the bottle cap 6 gripped by the clamping part can stably enter the bottle or other container, the structure of the clamping part can refer to the relevant structure in the Chinese utility model patent with patent number CN202323628069.2 entitled "Auxiliary Device for Straw Insertion into Bottle with Self-contained Straw Cap". The method of removing the bottle cap 6 after gripping it can refer to the relevant method in the cited documents in the background art. The first driving mechanism 4 and the second driving mechanism 5 mentioned above can be multi-axis linkage driving mechanisms or single-axis reciprocating motion driving mechanisms. When the bottle cap 6, which is limited by the cap-separating part 2 or the cap-feeding part 3, moves along a straight trajectory, the first driving mechanism 4 and the second driving mechanism 5 can be driven by cylinders or by commonly available structures that can form a straight motion trajectory. If it is necessary to make the bottle cap 6, which is limited by the cap-separating part 2 or the cap-feeding part 3, move along other trajectories, such as arc motion, the movement of the bottle cap 6 can be guided by the side wall shape of the limiting groove 32. Alternatively, the first driving mechanism 4 and the second driving mechanism 5 can be connected to each other by multiple cylinders to achieve the composite linear motion of the three coordinate systems, thereby achieving arc motion. Furthermore, in order to accommodate more preferred methods of conveying bottle caps 6 and to prevent bottle caps 6 that have not entered the cap-separating section 2 from moving forward, the limiting unit 22 also includes a baffle 222. The baffle 222 is connected to the side of the n-shaped plate 221 near the first driving mechanism 4. The height and length of the baffle 222 can prevent subsequent bottle caps 6 on the cap-separating channel 1 from actively or passively entering between the two partitions 212 during the process of the n-shaped plate 221 sending the bottle caps 6 that it limits into the cap-sending section 3 and after sending them in.

[0041] Third embodiment: (for a bottle cap 6 with a straw 622, where the straw 622 is too bent and the bending direction is random)

[0042] As one embodiment of this utility model, refer to Figures 9 to 12 Compared with the second embodiment, the difference is that the cap delivery part 3 also includes a limiting part 33. The limiting part 33 is used to passively straighten the straw 622 of the bottle cap 6, so that the clamping part can clamp the straw 622 and the cap 621 at the same time, so that the straw 622 can enter the interior of the bottle or other container stably and accurately, and improve the stability of capping or screwing. The limiting part 33 includes an elastic element 331 and a connecting element. The elastic element 331 is made of an elastic material such as rubber or sponge, and the connecting element is made of a ductile and / or flexible material such as aluminum. The elastic element 331 and the connecting element are connected, preferably by adhesive bonding. The elastic element 331 and the connecting element are installed together below and within the limiting groove 32. The elastic element 331 and the connecting element form a triangular structure with an opening, such as... Figure 7 As shown, when the straw 622, which is used to guide the bending, enters the circular groove, the straw 622 of the bottle cap 6 can be straightened by the constraint of the limiting part 33, so that the part of the straw 622 that contacts the elastic member 331 and the part of the straw 622 that extends out of the limiting part 33 can be straightened. This makes it convenient for the clamping part to grasp the straw 622 and the bottle cap 6 simultaneously. In this embodiment, the diameter of the circular groove is slightly larger than the diameter of the straw 622 to avoid the two from forming a jamming state, so as to avoid wear on the straw 622. For cases where wear resistance or wear is not required, the two methods can be used in combination.

[0043] Fourth embodiment: As one embodiment of this utility model, refer to Figures 10 to 12Compared to the previous three embodiments, the difference in this embodiment is that in order to shorten the length of the cap feeding channel 1, reduce manufacturing costs, and enhance the stability of the cap 6 conveying, it is not necessary to pile too much material on the cap feeding channel 1 to meet the independent separation and secondary conveying of the cap 6 by the cap separating part 2 and the cap feeding part 3. In the original technical solution, the conveying unit 11 is mainly tilted downward so that the caps 6 on it can slide freely to form passive movement, or the conveying unit 11 is set horizontally, and the push generated by the continuously discharged caps 6 in the cap sorter forces the caps 6 at the front end of the conveying unit 11 to move passively. Due to the influence of the cap sorting efficiency of the cap sorter, its discharge of caps 6 is uncertain. Usually, in order to ensure the supply of caps 6 and avoid the clamping part not grabbing any caps 6, resulting in empty processing, this embodiment adds a third driving mechanism 7 to the cap feeding channel 1 to assist in the conveying of the caps 6, so that the caps 6 can move autonomously and can enter the n-shaped plate 221 faster, improving the cap feeding efficiency and speeding up the overall production efficiency.

[0044] The third driving mechanism 7 can adopt a tangible driving structure, such as the relevant technology in the Chinese utility model patent application number CN201621362926.6 entitled "Flexible Cap Delivery Device", which actively delivers bottle caps 6 using a conveyor belt and servo motor. Alternatively, it can adopt an intangible driving method, such as the relevant technology in the Chinese utility model patent application number CN201620995782.1 entitled "Double Cap Delivery Channel 1". Or, for example, it can use directional airflow to drive the bottle caps 6, so that each bottle cap 6 or bottle caps 6 within a set range can obtain continuous thrust to meet the set delivery requirements. The device that generates airflow is a common device on the market, such as an air pump, which will not be described in detail here. In order to enhance the formation of good and effective thrust for different types of bottle caps 6, an air outlet 71 with a special shape is provided. like Figure 4 and Figure 6 and Figure 12 As shown, in Figure 12 The airflow direction and other indicators are marked in the middle. At this time, the bottle cap 6 conveyed on the conveying unit 11 is preferably a round cap, a stepped round cap 61, or other bottle cap 6. The third drive mechanism 7 includes an air pump and an air outlet 71. The conveying plate 111 or the support plate 112 has a cavity and an air inlet. The air inlet is connected to the air pump. In the first embodiment, the conveying plate 111 has a plurality of air outlets 71 communicating with the cavity on the surface below the conveying bottle cap 6. The air outlets 71 are inclined toward the output direction of the bottle cap 6, so that the airflow gushing out from the air outlets 71 can push the bottle cap 6 to move autonomously. In the second and third embodiments, the inner surface of the side wall of the support plate 112 is provided with a plurality of air outlets 71 that communicate with the cavity. The air outlets 71 are inclined toward the output direction of the bottle cap 6, so that the airflow gushing out from the air outlets 71 can push the bottle cap 6 to move autonomously. Furthermore, in order to enhance the driving force on the bottle cap 6, the air outlet 71 is triangular, and the triangle is formed by the upper surface of the conveyor plate 111 protruding into the cavity, so that the airflow can be concentrated in a bundle along the direction of the protrusion to complete the driving force on the bottle cap 6.

[0045] Furthermore, when assisting the driving of a single round cap, in order to prevent the cap 6 from being blown away from the conveying unit 11, an obstruction can be set above the cap 6. For example, an additional guide rod 122 can be used, which is set directly above the cap 6 on the conveying plate 111 to block the cap 6 from moving upward due to airflow. The lowest point of the guide rod 122 used to block the cap 6 from being blown away from the conveying unit 11 is no more than twice the height of the cap 6 from the conveying plate 111, so as to prevent the blown-away cap 6 from being superimposed with the cap 6 that has not been blown away, thus affecting the subsequent conveying of the cap 6. Meanwhile, the obstruction can also be a limiting plate 8, which uses a plate-like structure to block the bottle cap 6 that moves upward due to airflow. The lowest end of the limiting plate 8 used to block the bottle cap 6 from being blown away from the conveying unit 11 is no more than twice the height of the bottle cap 6, so as to avoid the blown-away bottle cap 6 from being superimposed with the unblown bottle cap 6, which would affect the subsequent conveying of the bottle cap 6. The guide rod 122 or the limiting plate 8 provided above for the bottle cap 6 to block the upward movement of the bottle cap 6 due to airflow can be detachably connected to the conveying unit 11, so that it can be adjusted as the height of the bottle cap 6 changes.

[0046] For bottle caps 6 such as duckbill pump caps 63 and gun caps 62, the guide rod 122 only needs to be set at the cap head 621 for clamping, so that the bottle cap 6 can move upward by airflow. This is because, generally speaking, the width of the cap head 621 is smaller than the width of the bottle cap 6, and the guide rod 122 can prevent the bottle cap 6 from moving upward as a whole. For bottle caps 6 of the type such as stepped round cap 61 and spray pump cap 63, since the cap head 621 of the bottle cap 6 is composed of two or more round caps, and the diameter of the upper round cap is generally smaller than that of the lower round cap, it is only necessary to make the limiting guide unit 12, that is, the two guide rods 122, clamp the upper round cap and block part of the lower round cap to prevent the entire bottle cap 6 from moving upward due to airflow.

[0047] Working principle: Considering the various types of bottle caps 6 being conveyed and the characteristics of the bottle caps 6 themselves, the first bottle cap 6 at the front end of the conveying channel is independently separated to the cap-separating part 2 and limited to prevent the bottle cap 6 from moving or rotating to prevent offset. Under the drive of the first driving mechanism 4, the bottle cap 6 is moved to the cap-feeding part 3 and limited by the cap-feeding part 3. Under the drive of the second driving mechanism 5, the cap-feeding part 3 moves the bottle cap 6, which is simultaneously limited by the cap-separating part 2 and the cap-feeding part 3, to a set position and then cooperates with the clamping part, so that the clamping part can clamp or adsorb the bottle cap 6. This allows the clamping part to clamp or adsorb the bottle cap 6 from top to bottom or to move it horizontally. This separately set cap-feeding device is used to cooperate with one clamping part. When it is necessary to increase the efficiency of capping or screwing, multiple sets of this device can be set to improve the overall production efficiency. The design and reference of the limiting groove 32 in multiple embodiments Figure 6 and Figure 9 As can be seen, the driving directions of the first driving mechanism 4 and the second driving mechanism 5 ensure that the bottle cap 6 is blocked by the side of the limiting groove 32 in the set moving direction. This prevents the bottle cap 6 from being affected by inertial force during intermittent movement, thus avoiding it from not maintaining the set position. Furthermore, the limitation of the size of the limiting groove 32 can prevent the cap head 621 of the bottle cap 6 with straw 622 from shifting, which would cause the gripper to touch the cap head 621 when gripping the cap, thus preventing the cap from being gripped. Meanwhile, as a preferred option, refer to Figure 6 The mounting plate 31 moves to the set position, and the center line of the bottle cap 6 on it is preferably in the same vertical horizontal plane as the center line of the bottle body conveyed on the conveyor line. This allows the clamping part to only need to move up and down and left and right to grip and press the cap. If the clamping part has a rotation function, the capping process can be performed. In this case, the clamping part does not need to be equipped with a three-axis drive mechanism to complete the relevant process, reducing manufacturing costs.

[0048] Although various embodiments of the present invention have been shown and described, and each embodiment includes several combinations, it will be understood by those skilled in the art that many changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cap feeding device for cooperating with a cap feeding channel (1) and a clamping part, characterized in that: The device includes a cap-separating part (2), a cap-feeding part (3), a first driving mechanism (4), and a second driving mechanism (5). The cap-feeding channel (1) is connected to the cap-separating part (2) at its output end along the cap (6) conveying direction. One end of the cap-separating part (2) is connected to the first driving mechanism (4), and the other end is connected to the cap-feeding part (3). The cap-feeding part (3) is connected to the second driving mechanism (5). The cap-separating part (2) is used to independently separate one cap (6) at the front end of the cap-feeding channel (1) and move it to the cap-feeding part (3) under the drive of the first driving mechanism (4) and limit it. The cap-feeding part (3) moves the limited cap (6) to a set position under the drive of the second driving mechanism (5) and then cooperates with the clamping part.

2. The cap feeding device according to claim 1, characterized in that: The cap feeding part (3) and the cap separating part (2) cooperate with each other, and the two transport the independently separated bottle caps (6) to the set position in a "Z-shaped" trajectory with an included angle greater than or equal to 90° and less than 180°, so as to cooperate with the clamping part.

3. The cap feeding device according to claim 1 or 2, characterized in that: The cap delivery channel (1) includes a delivery unit (11) and a limiting guide unit (12). The delivery unit (11) is used to deliver the bottle cap (6). The limiting guide unit (12) is connected to the delivery unit (11). The limiting guide unit (12) is used to limit the delivery direction of the bottle cap (6), or, while limiting the delivery direction of the bottle cap (6), it also limits the rotation of the bottle cap (6).

4. The cap-feeding device according to claim 1 or 2, characterized in that: The cap-separating section (2) includes a separating unit (21) and a limiting unit (22). The separating unit (21) is connected to the output port at the front end of the cap-feeding channel (1) and is used to restrict the movement of the cap (6) at the front end of the cap-feeding channel (1). The limiting unit (22) is connected to the first driving mechanism (4). The limiting unit (22) performs secondary limiting on the cap (6) whose movement is restricted by the separating unit (21) or simultaneously restricts the rotation of the cap (6) while performing secondary limiting, and sends it to the cap-feeding section (3) under the drive of the first driving mechanism (4).

5. The cap feeding device according to claim 4, characterized in that: The limiting unit (22) is also connected to a baffle (222), which is used to block bottle caps (6) that are not limited by the separating unit (21) and can continue to move.

6. The cap feeding device according to claim 1 or 2, characterized in that: The cap delivery part (3) includes a mounting plate (31) and a limiting groove (32). The mounting plate (31) is connected to the second drive mechanism (5). The mounting plate (31) has a limiting groove (32) for restricting the free movement of the bottle cap (6) and having a guiding function.

7. The cap feeding device according to claim 6, characterized in that: The mounting plate (31) is also equipped with a limiting part (33), which is used to limit the cap (621) of the bottle cap (6) with straw (622) from shifting during the movement of the mounting plate (31).

8. The cap feeding device according to claim 3, characterized in that: It also includes a third drive mechanism (7), which is connected to the conveying unit (11) and is used to actively drive the bottle cap (6) on the conveying unit (11) to move along the conveying direction.

9. The cap feeding device according to claim 8, characterized in that: It also includes a limiting plate (8), which is installed on the conveying unit (11) and is located directly above the bottle cap (6) thereon, in order to prevent the bottle cap (6) from being passively removed from the conveying unit (11).

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